Proposal
Completely remove the Power and Defense stat.
Instead give those benefits inherent to either your overall gear stat total, or split the total amount of gear stat types into ones that grant power, and ones that grant defense in addition their main stat
Details/background on your proposal
So in regards to the first version of it, instead of having a power and defense stat, you instead are given hp and damage bonuses depending on your overall stat total granted by other stats.
Maybe 1 Power, 2 Defense to keep a relatively fair ratio.
In the second rendition, instead a stat will grant one or the other:
So, Haste, Range, Drawback, and Size give power in addition to the stat
while Dexterity, Pierce, Resistence, and Regeneration increase defense.
Insanity and Warding don’t give anything.
Drawback instead will passively give a large power bonus with the stat.
I think some stuff has high defense and drawback, so maybe a variant that gives defense instead would also be smart.
In either case you can see your “Total power” and “Total defense” entirely seperate from your gear stats.
Reason to add/change
This will make it so players can actually diversify their stats without just playing suboptimally.
Its obvious that Power and Defense simply hold too much sway and nerfing it into the ground isn’t actually solving the problem.
Because the game is simply designed around having it. If fights take too long, and bosses are too punishing, it becomes pointless to do anything other than what makes you hit harder and tank more.
Trying to nerf Power and Defense when the game is cruelly punishing with many bosses, makes it so players will want it more, and more of it.
So if the problem is that you can’t NOT have power and defense, the best solution is to make sure you can’t NOT have power and defense.
Players will start instead leaning into the more balanced stats in a way that leans towards their builds and actually getting use out of them.
What you have is a prime opportunity where no stat has the advantage in a meta sense except for defense and power.
So EVEN the playing field and that way it will encourage experimentation.